Bathroom Fan Discharge Direction Horizontal Duct Diameter 4 in Duct Shape Round Housing Finish Powder-Coated Housing Material Steel Heater Without Heater Includes Duct Connector With Damper Mounting Ears to Attach to Ceiling Joist Mounting Location Ceiling Exhaust Airflow @ 0.100 in SP 100 cfm Maximum Noise Level 4.5 sones Noise Level @ 0.100 in SP @ 5 ft 5 sones Maximum Coverage Area 90 sq ft Number of Speeds 1 Overall Depth 16 3/4 in Overall Height 5 3/4 in